把55g50摄氏度的A物质饱和溶液蒸干,得到5gA物质。求A物质在50摄氏度是的溶解度。把55g50摄氏度的A物质饱和溶液蒸干,得到5gA物质。求A物质在50摄氏度是的溶解度。要过程要过程要过程要过程````````````````````````````````````````````````````````````````````````````````````要过程